Every accepted species in the genus is listed. A name links to its page when we hold at least three commercially licensed photographs of it. Where we do not, the row shows how many we actually found, which is usually none.
| Species | Authority | Usable photographs | Page |
|---|---|---|---|
| Ambrosia artemisiifolia | L. | 3,294 | documented |
| Ambrosia trifida | L. | 2,676 | documented |
| Ambrosia dumosa | (A.Gray) W.W.Payne | 1,725 | documented |
| Ambrosia psilostachya | DC. | 1,298 | documented |
| Ambrosia salsola | (Torr. & A.Gray) Strother & B.G.Baldwin | 1,107 | documented |
| Ambrosia chamissonis | Greene | 785 | documented |
| Ambrosia deltoidea | (Torr.) W.W.Payne | 639 | documented |
| Ambrosia ambrosioides | (Delpino) W.W.Payne | 473 | documented |
| Ambrosia acanthicarpa | Hook. | 257 | documented |
| Ambrosia monogyra | (Torr. & A.Gray) Strother & B.G.Baldwin | 157 | documented |
| Ambrosia chenopodiifolia | (Benth.) W.W.Payne | 90 | documented |
| Ambrosia confertiflora | DC. | 83 | documented |
| Ambrosia hispida | Pursh | 83 | documented |
| Ambrosia tenuifolia | Spreng. | 63 | documented |
| Ambrosia ilicifolia | (A.Gray) W.W.Payne | 48 | documented |
| Ambrosia cordifolia | (A.Gray) W.W.Payne | 34 | documented |
| Ambrosia eriocentra | (A.Gray) W.W.Payne | 32 | documented |
| Ambrosia pumila | (Nutt.) A.Gray | 32 | documented |
| Ambrosia arborescens | Mill. | 20 | documented |
| Ambrosia bryantii | (Curran) W.W.Payne | 20 | documented |
| Ambrosia bidentata | Michx. | 19 | documented |
| Ambrosia camphorata | (Greene) W.W.Payne | 15 | documented |
| Ambrosia cheiranthifolia | A.Gray | 14 | documented |
| Ambrosia magdalenae | (Brandegee) W.W.Payne | 10 | documented |
| Ambrosia artemisioides | Meyen & Walp. | 9 | documented |
| Ambrosia grayi | (A.Nelson) Shinners | 9 | documented |
| Ambrosia peruviana | Willd. | 5 | documented |
| Ambrosia porcheri | P.D.McMillan & L.Prevost | 2 | below the evidence gate |
| Ambrosia canescens | A.Gray | 1 | below the evidence gate |
| Ambrosia × helenae | Rouleau | 0 | below the evidence gate |
| Ambrosia × intergradiens | W.H.Wagner | 0 | below the evidence gate |
| Ambrosia × platyspina | (Seaman) Strother & B.G.Baldwin | 0 | below the evidence gate |
| Ambrosia acuminata | (Brandegee) W.W.Payne | 0 | below the evidence gate |
| Ambrosia carduacea | (Greene) W.W.Payne | 0 | below the evidence gate |
| Ambrosia crithmifolia | DC. | 0 | below the evidence gate |
| Ambrosia cumanensis | Kunth | 0 | below the evidence gate |
| Ambrosia dentata | (Cabrera) M.O.Dillon | 0 | below the evidence gate |
| Ambrosia divaricata | (Brandegee) W.W.Payne | 0 | below the evidence gate |
| Ambrosia diversifolia | Rydb. | 0 | below the evidence gate |
| Ambrosia flexuosa | (A.Gray) W.W.Payne | 0 | below the evidence gate |
| Ambrosia johnstoniorum | Henrickson | 0 | below the evidence gate |
| Ambrosia linearis | (Rydb.) W.W.Payne | 0 | below the evidence gate |
| Ambrosia microcephala | DC. | 0 | below the evidence gate |
| Ambrosia nivea | (B.L.Rob. & Fernald) W.W.Payne | 0 | below the evidence gate |
| Ambrosia pannosa | W.W.Payne | 0 | below the evidence gate |
| Ambrosia polystachya | DC. | 0 | below the evidence gate |
| Ambrosia sandersonii | S.L.Welsh | 0 | below the evidence gate |
| Ambrosia scabra | Hook. & Arn. | 0 | below the evidence gate |
| Ambrosia tacorensis | Meyen | 0 | below the evidence gate |
| Ambrosia tarapacana | Phil. | 0 | below the evidence gate |
| Ambrosia tomentosa | Nutt. | 0 | below the evidence gate |
| Ambrosia velutina | O.E.Schulz | 0 | below the evidence gate |
| Ambrosia villosissima | Forssk. | 0 | below the evidence gate |
This site is commercial, so it can only publish photographs licensed for commercial use. Roughly three quarters of the photographs on iNaturalist are CC BY-NC, which excludes them. A species needs at least three usable photographs before we will build it a page, because a page with one picture and no traits tells you nothing you could not get from a search result, and generating hundreds of thousands of those is precisely the practice that got the previous version of this site deleted.
So the species above without a link are not errors and they are not omissions. They are real, accepted plants that we cannot yet document to the standard we hold ourselves to, and the count in the photographs column is exactly how far short we fall.